Rapid holistic perception and evasion of road hazards
DOI: 10.1037/xge0000665
archive: archived pipeline: cataloged verified
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Summary
This study investigates the speed and nature of hazard perception in dynamic driving environments, challenging the prevailing view that drivers must serially search for hazards to detect them. Motivated by the need to understand human capabilities for safe interaction with autonomous vehicles—particularly during unexpected takeover requests—the authors ask whether drivers can perceive road hazards holistically and rapidly, similar to how static scene gist is processed. The research aims to determine the minimum viewing duration required for drivers to detect hazards and execute appropriate evasion maneuvers, comparing younger and older drivers to assess age-related differences in this rapid perception. The researchers developed a new dataset, the Road Hazard Stimuli, comprising 503 real-world dashcam videos (253 hazardous, 250 non-hazardous). They conducted a laboratory experiment with 39 participants (19 younger, 20 older) using a large-screen display and steering/pedal controls to simulate driving. Participants completed two tasks: a hazard detection task (indicating presence/absence of a hazard) and a hazard evasion task (choosing a steering direction to avoid a hazard). Stimulus durations were controlled via adaptive staircases to determine the threshold for 80% accuracy. Two temporal conditions were used: "cue-locked," which provided 200 ms of context before the hazard appeared, and "response-locked," which showed video ending at the moment the original driver reacted. The results demonstrated that drivers can perceive hazards holistically without serial search. Younger drivers required only 220 ms to detect hazards in the cue-locked condition and 388 ms to correctly choose an evasion maneuver. Older drivers required significantly longer durations: 403 ms for detection and 605 ms for evasion. While both groups performed well above chance with brief exposures, older drivers consistently needed more time to process the scene and respond. There were no significant gender effects. The data indicate that hazard detection is faster than hazard evasion, and that providing contextual information prior to the hazard's emergence reduces the time needed for detection. These findings suggest that human hazard perception is a fast, holistic process rather than a slow, serial search, contradicting traditional models of driver attention. The results have significant implications for autonomous vehicle design, indicating that drivers can perceive critical information in moving scenes within fractions of a second. However, the substantial delay in older drivers' perception and response times highlights the need for age-specific considerations in takeover request systems. The study also contributes the Road Hazard Stimuli dataset to the field, enabling further research on dynamic scene perception and human-automation interaction.
Key finding
Drivers can holistically detect and respond to road hazards with brief viewing durations, although older drivers require significantly longer exposure times than younger drivers for both hazard detection and evasion.
Methodology
lab_experiment
Sample size: 39
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via openalex_abstract on 2026-05-08.
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | — | — | — | 1 | 2026-05-07 |
| archive | success | canonical_url | — | — | 7 | 2026-06-06 |
| extract | success | cached | — | — | 3 | 2026-06-10 |
| clean | success | clean | — | — | 1 | 2026-06-04 |
| chunk | success | chunk | — | — | 1 | 2026-06-04 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-04 |
| enrich | success | openalex | — | — | 2 | 2026-05-08 |
| promote | success | — | — | — | 1 | 2026-05-07 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 15 | 2026-06-11 |
| verify | partial | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified_with_issues.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- hazard perception
- hazard perception training
- useful field of view
- peripheral attention
- looked but failed to see
- situational awareness
Information type
What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).
- Empirical Findings: behavioral performance data